![](http://www.alamy.com/thumbs/6/5964C445-2FF7-428D-8132-CA28D6A97B81/2ACWRF5.jpg)
Chemistry equipment, including glass flasks, saltpetre, alum.
Size: 4318px × 4047px
Photo credit: © Dorling Kindersley/UIG/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: alum, background, chemistry, equipment, flask, glassware, group, horizontal, laboratory, liquid, medium, objects, people, salpetre, shot, studio, transparent, variation, white